Loose-leaf binder



J. A. GIBSON LOOSE-LEAF BINDER Feb. 8, 1949.

Filed Sept. 21, 1945 IN V EN TOR.

BY v

ATTORNEY Patented Feb. 8, 1 949 UNITED STATES PATENT OFFICE j 2,461, 501 p oose-LEAF" BINDER V J oscph A. Gibson, Kimball, Nebr. ApplicationSeptember 21, 1945, Serial No. 617,829

This invention relates to a loose leaf binder.

more particularly of the type known'as an arch lock binder, and has forits principal object the provision of a neat, simple, andhighlyeflicient device which can be quickly 'and'easily opened to receivesheets, quickly and easily closed to hold the sheets in'place, and whichwill be self-locking in the closed position so. that it cannot beaccidentally opened to release the sheets.

' Other objects and advantages reside in the detail construction of theinvention, which is de-- signed for simplicity, economy, and efliciency.These Will become more apparent from the following description. 1 1,

In the following detailed description of the invention, reference ishad. to the accompanying drawingwhich forms apart thereof. Like numeralsrefer to like parts in" all "views of the drawing and throughout thedescription.

In the drawing:

Fig. 1 is a perspective view illustrating the improved arch lock binderin place on a backing board;

Fig. 2 is a front view of the improved binder;

Fig. 3 is a cross-section therethrough, taken on the line 33, Fig. 2,illustrating the binder in the unlocked or partially closed position;

Fig. 4 is a similar view illustrating the binder in the fully closed andlocked position;

Fig. 5 is a similar view illustrating the binder in the open position;

Fig. 6 is a rear view of the improved binder; and

Fig. 7 is a detail view illustrating the construction of the lockingmember of the improved binder.

This invention is more particularly designed as an improvement over thearch file illustrated in applicants Patent No. 2,207,192, which issuedJuly 9, 1940.

The improved binder is designed for attachment to a backing board H] bymeans of suitable attachment screws The binder comprises a base plate|2, the upper edge of which is turned at right angles to form ahorizontal aligning flange |3 which overlaps the upper edge of the boardl0. An opening I4 is provided in the plate l2 and backing board I!) forhanging purposes.

Two bearing plates l5 having outwardly flanged bottom edges are rivetedin spaced-apart relation to the base plate |2 by means of suitablerivets I 6. A crank shaft l I is rotatably mounted in the plates l5 andextends therebetwe'en, terminating in an angularly-turned handleiB. Thecrank portion of the crank shaft I1 supports an elon- 3 Claims. (Cl.129-41) '2 gated locking member l9. The extremitiespf the locking memberH) are turned outwardly to form ears '20 through which the shaft l1passes. The member i9 is perforated toslidably receive two Jhooked archmembers 2|." The ar'ch 'members 2| are secured to; and project from, arotatable channel member 22. Each' hook member extends through oneflange'of the channel member 22, thence is turned'outwardly and securedbyrolling back the extremity of the other flange of the channel member,as shown .at 23, to form a projecting pivot pin 24. Thus the" wire orrodwhich is used toform the arch member 2| serves a doublepurpo'se inprovidingthe pivot pins 24; The" pins 24 extend throughbearing openingsi theplates'l5 below the crank shaft 11." The extremities of the archmembers 2| coact with posts 25 to ,form thefcornplete bindei genclosure.'The 'pos ts25" are formedbybendiriga U-sha'ped rod atright'angles toform an inverted V-shaped back portion 26. The extremities of the rodare forced through receiving openings in the back plate |2 to form theposts 25 and the base portion 26 thereof is welded or otherwise securedto the back of the back plate |2 to rigidly support the posts. Thebackboard 0 may be recessed to receive the portion 26 if desired.

To open the arch member 2|, the handle is swung outwardly. This causesthe locking member l9 to slide along and lift the arch members 2|, asshown in Fig. 5. To close the arch member 2|, the handle I8 is swunginwardly, thus causing the crank shaft I! to push the locking memberdownward to close the arch members 2| to the position of Fig. 3.

To lock the arch members, the handle I8 is" forced further inward,causing the extermities of the arch members to contact the ends of theposts 25. Further movement forces the latter extremities against thetops of the posts 25 so as to flex or bend the arch members until thecrank portion of the crank shaft I! and the locking member I9 to passtheir aligned or dead center position, as indicated by the center linesA and B, respectively, in Fig. 4, with the lockin member I! lyingagainst the flange of the channel member 22. Further movement isimpossible, since the crank shaft cannot pass the locking member, andreturn movement is prevented due to the past dead center position of thecrank l1 and the locking member l9. The file is therefore securelylocked until the handle I8 is again pulled outwardly to flex the archmembers past the locking point.

While a specific form of the improvement has the extremities of saidchannel members through 7 said bearing plates, said pins being placedadjacent one longitudinal edge of said channel member; arch membersprojecting from the other longitudinal edge of saidchannel member inalignment with said posts; an independently V rotatable crank shaftextending transversally of saidarch. members; and means iorptransmittingthe eccentric motion of. said crank shaft tosaid archmembers; forrotating said channel member onitspivotpins, v j p v 2; A loose leafbinder comprising: a base plate; leai receiving posts projecting fromsai'd'plate; a pair of spaced bearing plates projecting from saidiplate;a rotatable channel member. extending between said; plates; pivot pinsprojecting from the extremities of said channel member through saidbearing plates, said 'pins being placed adjacent one longitudinal edgeof said channelmember; arch members projecting from the other.longitudinal edge of said channelmemher: in alignment with said posts;'a locking member havingperforations slidably receiving said archmembers; and a crank shaft extending between. said bearing plates andhavingfa crank portion supporting; said. locking member so that rotationof said. crankshaft will cause said lockagainst saidposts;

4 ing member to swing said arch members toward and away from said posts.

3. A loose leaf binder comprising: a base plate; leaf-receiving postsprojecting from said plate; a pair of spaced bearing plates projectingfrom said plate; a rotatable channel member extending between saidplates; pivot pins projecting from the extremities of said channelmember through said bearing. plates; said pins being placed'adjacentvone longitudinal edge of said channel member; arch members projectingfrom the other longitudinal edge of said channel memher in alignmentwith said posts; a locking memher having perforations slidably receivedsaid arch members; a crank shaft extending between said bearing platesand having a crank portion supporting said' locking member; and a handlefor rotating said crank shaft, the throw of the crank portion of saidcrank shaft and the spacing between-the axis of said pivots and the axisof said crankshaft being, such that said locking member will lieagainstjsaid channel member when said crank shathasbeen rotated beyondits extreme closing position 'to lock said arch. members JOSEPH- A.GIBSON.

REFERENCES CITED" The following references are of record in the file ofthis patent:

- UNITED' STATES PATENTS Great Britain Jan. 1; I898

